So, here we have the following triangle:
To find x, we could use the fact that the sum of all internal angles of a triangle is always 180°. So, we could write:
[tex](8x+2)+60+70=180[/tex]And now, solve this equation for x:
[tex]\begin{gathered} 8x+132=180 \\ 8x=180-132 \\ 8x=48 \\ x=6 \end{gathered}[/tex]Therefore, x=6
